Question about 2002 Ford SVT Focus

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Diesel engine cuts out and glow plug comes on please help

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My guess... Under hot conditions, all has been well? Then one cold morning there is a hard start that kills the battery. A worry about the glow plugs and possibly find that the power to the glow plug relay is cut.

Same problem here. I replaced the relay from the manufacture of the vehicle, the relay seems to be a dudd. Replace open circuit if any, and try different but same relay product manufacturer.

Diagnose first

Posted on Jun 10, 2019

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Does the glow plug/coil light flash at all???? once would indicate glow plug relay fault! three times would indicate FUEL pump failure! sorry never experienced two flashes....

Kind regards

Posted on Oct 20, 2009

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96 Ford F-350 Turbo Diesel. Replaced 4 glow plugs on driver side. After replacing the glow plugs and the glow plug relay, the truck will crank slow and not start. Batteries power drained quickly while...


Have a load test done on the batter to check for failing cells. For diesels to start any thing less than a fully charged battery good battery is a waste of time as the engine needs fast RPM to heat the air to ignite the fuel and slow rpm's just doesn't cut it.

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they use diffr, diesels world wide
which one you got?
and try some commas please.
glow plugs too short, plugs are what?
my wild guess, the diesel is hard to start>? and what is the outdoor temperature, and is the fuel fresh? not 3 years old? or water contaminated?

start any engine post with
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Does a toyota hilux surf 1995 diesel have spark plugs and points as in the days of yore??


Diesel engines don't have spark plugs. They use compression and heat to fire the diesel. Most diesel engines have glow plugs which are designed to preheat the combustion chamber to help burn the diesel fuel when you start it up. Hope this helps.

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I have a 2000 Jetta diesel. Can you tell me where the plug for the block heater is? If indeed there is one.


In addition to the 4 primary glow plugs, the cooling system also has 3 Coolant Glow Plugs to help provide extra heat to the cooling system in order to warm-up the vehicle's interior more quickly, and enhance overall engine warm-up time. (Example - Some Mercedes diesel engines use electrical heaters in the cabin because their engine is so thermally efficient.)
Likewise, this auxiliary source of heat from the 3 Coolant Glow Plugs is necessary because of the VW 1.9 TDI engines outstanding efficiency, which wastes very little heat.


The 3 Auxiliary Coolant Glow Plugs are located at the end of the aluminum cylinder head (in a protruding flange) directly below the vacuum (brake booster) pump, which also connects to a coolant hose.

tdisline_180.jpg


The 3 Auxiliary Coolant Glow Plugs use two (underhood) relays which are monitored and controlled by the ECU. During a cold start, the vehicle's interior temperature selector switch helps the ECU choose one of three modes depending on the amount of heat required to warm-up the coolant.

For example, Coolant Glow Plug #1 can be selected to operate all by itself, or #2 and #3 can operate together as a two-some, or lastly, all three glow plugs can form a triple source of heat for maximum enhancement of engine warm-up time.

After the engine is completely warmed up and the thermostat is open, the Coolant Glow Plugs normally shut-off and remain off unless the (thermally efficent) engine cools down sufficiently to have the computer signal them to come back on to keep the engine and cabin air warm. Extensive idling times at stop lights or in the driveway are scenarios where these glow plugs are most likely to recycle on and off.

In conclusion, the period of Preglow and Afterglow is determined by the engine's coolant temperature (during a cold or hot start), which helps the ECU select a predetermined time-cycle for the combustion chamber and / or Auxiliary Coolant Glow Plugs to follow.

Finally, one myth that needs to be immediately debunked, is the belief that the TDI's advanced Glow Plug System is linked to the opening of the driver's side door, which is false! It is also noteworthy to mention that some earlier VW diesel glow plug systems were operated in this manner, but not so with the advanced VW Jetta 1.9 TDI engine.




Please do rate my response. Thanks!

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Hi my name is Tom and I am here to help you.

If you think of glow plugs as the spark plugs of a diesel engine, the task of replacing them makes more sense. Have you ever changed spark plugs? If so do the same for your diesel car.

Do one cylinder at a time until you have changed all of the plugs. Check your dash to see if they are working. I had a 1980 Chevy with a diesel engine and the change was done in about an hour.

If I can be of any help, please feel free to call or email me. Also, please take the time to rank me as far as helpfulness. This is the only was I can improve my "helping" skills.

TomE

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Car wont start diesel engine Could it be the 'glow plug'? what is a glow plug? how can i test?


A glow plug is a small heating element in the cylinder. It heats the diesel so that starting can be made easy. Is your car standing in the open frozen parking If yes, then it would require a lot of battery power to first heat all the cylinders and then turn the engine to start. What we do in such conditions is to light up some fire under the car and heat the fuel system enough for the diesel to warm up a little and thus save the battery for glow plugs. Generally, all vehicles have an indicator light which comes on when the glow plugs are ready for starting. The diesel will ignite on compression, but it has to reach the cylinder and thus has to be flowing. In cold it freezes and hence the need for glow plugs and the heat. If it is parked in heated parking then the need for glow plugs decreases.

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Only thing is Diesels dont use spark ignition. Most reasons for failure of diesels to start is in the glow plug system. Usually just replacement of all glow plugs is sufficient but could be deeper. If you know what your doing you can give a small spritz of starting fluid in the air cleaner and it will start and stay running usually proving a glow plug problem. But please be warned a small spritz. Too much ether can damage a diesel engine. Hope I helped. Thanks

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Good Day
The glow plug relays are located on the right front shock tower. Remove the cover and you will see two relays If I remember I think they are round, but not sure.

Please let me know how you make out and if there is anything else that I might be able to help you with.

Cheers

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